Newtron surprises Sonic again using optical camouflage to try and blast Sonic. He can also transform into a rocket and charge towards Sonic. — Profile, Sonic the Hedgehog 4: Episode I website
The Newtron (メレオン,Mereon?) is a recurring enemy in the Sonic the Hedgehog series. They are a mass-produced, chameleon-based Badnik model created by Dr. Eggman. Usually coming in two types, the Newtrons can camouflage themselves.
Newtrons are based on chameleons. Newtrons have a head, a stripy tail and four white feet with three fingers. One of these fingers are backwards so the Newtrons can get an extra grip. They also have yellow eyes with small pupils and a brown and sharp parietal crest. Newtrons come in two color varieties: green and blue. The green variation has yellow eyes and the blue varitation has red eyes.
Newtrons made their first appearance in the original 16-bit version of Sonic the Hedgehog as enemies. In this game, they come in two varieties, both of which appear in the Green Hill Zone.
In gameplay, the Newtrons hang out on the side of cliffs and remain invisible until the playable character approaches them. Their behavior from there depend on their colors:
Green: These Badniks never move from their wall. After becoming visible, they will spit a ball of energy at the player before turning invisible again. Once vanished, these Newtrons cannot be destroyed even if the player attacks the area where they are hiding.
Blue: After becoming visible, these Badniks drops from the wall and morphs into a rocket, which chases the playable character in a fixed horizontal line without returning to their wall to turn invisible again. The blue variety is easier to deal with as it can be attacked, unlike most of its green counterparts.
Both of these badniks can be destroyed with the Spin Jump as they starts to appear on the wall. On some occasions, the player is unable to destroy green Newtrons depending on their placement in the Zone.
In 8-bit version of the game with same name, only the green variation of Newtrons appear at Jungle Zone, although they have the same attack patterns as their 16-bit counterpart. However Newtrons do not have Animals inside of them as power source like many other Badniks in the Master System and Game Gear titles.
In the 8-bit version of Sonic the Hedgehog 2, the Newtron are known as Meleons (メレオン,Meleons?) in the Japanese manual. In this game, the Newtrons appear in Under Ground Zone, Sky High Zone and Green Hills Zone. This game also has the two variations of Newtrons, although the green ones have the same color scheme as the rocket-types. Both types have the same attack patterns from previous game, although none of them contain Animals.
In the Nintendo 3DS version of Sonic Generations, both blue and green Newtrons appear in Green Hill Act 1. Despite their redesign for the game, the Newtrons have the same attack pattern as in their first game and are placed in the exact same places. However, none of Newtrons contain Animals.
In both versions of Sonic Lost World, the Newtrons regain their original design, although they are smaller. During the game, it turns out that the Badniks, the Newtrons included, got hijacked by the Deadly Six.
In gameplay, the Newtrons again come in two color variations. Their attack patterns are also the same as in their debut game: in addition to staying cloaked until the player approaches, blue ones will transform into missiles and jet along the ground, while green ones appear just long enough to fire an energy blast. Also, upon its defeat, a Newtron will release an Animal.
Newtrons possesses optical camouflage that let them camouflage themselves accordingly to the wall they are on and phase out of sight. They have also demonstrated two consist abilities which are sometimes exclusive to the color of their model:
The ability to spit balls of energy from their mouth
The ability to transform into a chameleon-shaped rocket, granting them flight
In the Sonic the Comic series published by Fleetway Editions, the Newtrons were standard models in Dr. Robotnik's Badnik army. In this media, they lacked any form of projectile weapons and cloaking ability, and were more akin to melee fighters. Depending on the artist, the Newtrons' design would differ between issues. Earlier models of Newtrons were also quadruped, but later models became bipedal.
The Newtrons got decommissioned after the occurrence of an electromagnetic pulse which affected the planet Mobius.
The toy company TOMY has released Newtron action figurine during the release of Sonic & Knuckles as it also includes a series of 21 Sonic figurines and these figurines came in packs of four under the Sonic & Knuckles label and were also released individually under a Sonic the Hedgehog label.